Pandemics have ravaged human civilizations through history. But global health crises have also sparked progress in culture and society, changing lives for the better. Water and sanitation systems improved and revelations led to innovations in limiting disease spread, as well as in treatments and vaccines.

“Public policy and society as a whole have been dramatically shaped by epidemics,” says Katherine Foss, author of Constructing the Outbreak: Epidemics in Media & Collective Memory.

Below are five positive changes that followed epidemics, pandemics and large-scale public health crises of the past.

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